Loading...
Please wait, while we are loading the content...
Similar Documents
Determination of the zincate diffusion coefficient and its application to alkaline battery problems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kautz, Harold E. May, C. E. |
| Copyright Year | 1978 |
| Description | The diffusion coefficient for the zincate ion at 24 C was found to be 9.9 X 10 to the minus 7th power squared cm per sec + or - 30 percent in 45 percent potassium hydroxide and 1.4 x 10 to the minus 7 squared cm per sec + or - 25 percent in 40 percent sodium hydroxide. Comparison of these values with literature values at different potassium hydroxide concentrations show that the Stokes-Einstein equation is obeyed. The diffusion coefficient is characteristic of the zincate ion (not the cation) and independent of its concentration. Calculations with the measured value of the diffusion coefficient show that the zinc concentration in an alkaline zincate half cell becomes uniform throughout in tens of hours by diffusion alone. Diffusion equations are derived which are applicable to finite size chambers. Details and discussion of the experimental method are also given. |
| File Size | 8069675 |
| Page Count | 21 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780011705 |
| Archival Resource Key | ark:/13960/t3421s03w |
| Language | English |
| Publisher Date | 1978-01-01 |
| Access Restriction | Open |
| Subject Keyword | Energy Production And Conversion Concentration Composition Sodium Hydroxides Alkaline Batteries Ions Potassium Hydroxides Diffusion Coefficient Equations Zinc Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
